DS14C535

+5V Supply EIA/TIA-2323x5 Driver/Receiver

General Description

The DS14C535 is three driver, five receiver device which

conforms to EIA/TIA-232-E and CCITT (ITU-T) V.28 stan-

dard specifications. This device employs an internal DC-DC

converter to generate the necessary output levels from a

+5V power supply. A SHUTDOWN (SD) mode reduces the

supply current to 10 µA maximum. In the SD mode, one re-

ceiver is active, allowing ring indicator (RI) to be monitored.

PC Board space consumption is minimized by the availability

of Shrink Small Outline Packaging (SSOP).

The DS14C535 provides a one-chip solution for the common

9-pin serial RS-232 interface between data terminal and

data circuit-terminating equipment.

This device allows an easy migration path to the 3.3V

DS14C335. The packages are the same. The N/C pins on

the DS14C535 are not physically connected to the chip.

Board layout for the DS14C335 will accommodate both de-

vices.

This device’s low power requirement and small footprint

makes it an ideal choice for Laptop and Notebook applica-

tions.

Features

n Pin compatible with DS14C335

n Conforms to EIA/TIA-232-E and CCITT (ITU-T) V.28

specifications

n Failsafe receiver outputs high when inputs open

n Operates with single +5V power supply

n One Receiver (R5) active during SHUTDOWN

n 4V/µs minimum Slew Rate guaranteed

n ESD rating of 3 kV on all pins (H, B, M)

n Available in 28-lead SSOP EIAJ Type II package

n Only four 0.1 µF capacitors required for the DC-DC

converter

Connection Diagram

Functional Diagram

DS14C535

DS011910-1

Order Number DS14C535MSA

See NS Package Number MSA28

DS011910-2

May 1998

© 1999 National Semiconductor Corporation

DS011910

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